Device for holding rounds in rolling-mills.



No. 662,916., Patented Dec. 4, l9'00.

J. DASCHBACH.

DEVICE FOR HOLDING BUUNDS IN ROLLING MILLS.

(Application filed Apr. 4, 1899.) (No Modal.)

2 She ets$heet l.

No. 662,9I6.

Patented Dec. 4, I900.

J. DASUIIBACH. DEVICE FOR HOLDING ROUNDS IN ROLLING MILLS.

(Application filed Apr. 4, 1899.)

2 Sheets--Sheet 2..

(lo Iodel.)

I I I I I IIL f llllllllllllll I. II .IIIIIIIIIII Il hV II IIIIIIII lI Miran States Patent rricn.

JOSEPH D ASCHBAOH, OF PITTSBURG, PENNSYLVANIA.

DIEVlCE FOR HOLDING ROUNS lN ROLLlNG WllLILd.

SPECIFICATION forming part of Letters Patent No. 662,916, dated December 4, 1900.

Application filed April 4, 1899- Serial No. 711,6L1. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOSEPH DASOHBAOH, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Devices for Holding Rounds in Rolling-Mills; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a device for holding and guiding round metal bars as they pass through the rolls during the rolling operation.

In the method commonly practiced at present in the rolling of metal bars round in crosssection, or rounds, as they are generally termed,the long bar of metal is grasped at different points in its length by tongs in the hands of skilled workmen and is fed with great care and skill to the difierent passes in the rolls, where a two-high mill is employed the bar being returned over the top roll to be grasped by the tongs and fed through the rolls again until an evenly-rounded surface has been imparted to the bar. As the reduction of the bar from an odd shape to a round is a gradual one and requires a number of passes through the rolls, it is necessary to give the bar a quarter-turn each time it is fed to the rolls in order to remove any fins formed by the passes in the rolls and to impart to the bar an evenly-rounded exterior. Where the bar is handled by tongs in the hands of workmen, great care and skill are required in grasping the bar at the proper points and giving it the necessary quarter-turn each time, as well as in guiding it with the requisite accuracy into the passes of the rolls to obtain a straight and properly-rou nded surface. Furthermore, according to the present practice a special mill has to be employed for rolling rounds, as the ordinary mill for rolling other shapes has a feed-table in front of the rolls for supporting the metal as it is fed to the rolls. Such a feed-table would interfere with the operation of handling rounds with tongs, as the workmen would be impeded in their movements and could not guide the rounds through the passes of the rolls with the requisite ac curacy.

The object of my invention is to provide a device for holding and guiding the rounds through the passes of the rolls which will dispense with thehandling by tongs in the hands of skilled workmen, thereby greatly reducing the cost and the time required in handling, while at the same time to provide for the rolling of the rounds on an ordinary mill provided with a feed-table, so that said mill may be used interchangeably for rolling rounds or other shapes.

To these ends my invention comprises, generally stated, in conjunction with a suitable rolling-mill,a guide-frame extending longitudinallyin front of the rolls and a carriage traveling on the guide-frame, and gripping mechanism and grip-closing mechanism on the carriage whereby the bar may be grasped by the tongs of the carriage and held thereby during its passage through the rolls, the rear end of the bar being generally grasped and the tong-carriage drawn by the bar toward the rolls as it holds the bar from twisting.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which Figure 1 is a plan view of a rolling-mill embodying my invention. Fig. 2 is a side View thereof. Fig. 3 is an end view, partly in section, of the table and the guide-frame and carriage. Fig. 4 is a plan view of a portion of the guide-frame with the carriage adjusted therein. Fig. 5 is a section on the line 5 5, Fig. at. Fig. 6 is a view of a portion of the rolls of the mill, indicating some of the passes.

Like characters indicate like parts in each of the figures.

In the drawings the letter a represents the housings of a suitable two-high mill, the rolls b 1) being journaled therein in the customary manner. The housings are provided with the ordinary rolladjusting mechanism 0. As these rolls are to be used for rolling rounds, they are grooved in the ordinary manner and when working in connection with each other form passes l 2 8, &c., substantially like those shown in Fig. 6. As the mill itself forms no part of my invention, do not deem it necessary to describe the same in further detail.

The mill is mounted on a suitable foundation, with the bed-plate d arranged in front and rear of same. Below the bed-plate dare suitable hydraulic cylinders e for raising and lowering the table in the ordinary manner. Supported by the plungers of the hydraulic cylinders e are the cross-beams ff, which form a support for the feed-table g. This table 9 may be of any suitable construction, the one illustrated being formed of parallel channel-bars, with the idle rollers h journaled in the bearings h at suitable intervals apart. Any suitable construction of table may of course be employed.

In front of the rolls 1) and at suitable intervals are the upright frames 2', said frames being secured to the cross-bars 7c by means of the bolts 70'. The cross-bars 7c are formed with the slots k through which the bolts 70 pass, the heads k of said bolts fitting against the shoulders 70 in said cross-bars 70. By this construction the upright frames 2' may be moved to different positions on the cross'bars k and secured in these positions by tightening the nuts of the bolts 1a.

In the upper portion of the framest' are the round-guide rods Z, arranged one above the other, said guide-rods acting as slides for the carriage 17., said carriage n having the curved seats a, with which the guide-rods Zengage, so that said carriage 91 may be freely moved to and fro on the guide-rods l in the manner more fully hereinafter set forth.

Pivoted to the carriage n by means of the bolts are the levers 0, said levers having extending down therefrom the clamping-jaws p. The lower ends of these clamping-jaws p are slightly curved, as at p, to enable them to conveniently grasp and hold the rounds to be rolled in the manner more fully hereinafter set forth. Springs 0" are interposed between the rear ends of the levers o and the shoulder n on the guides, studs r projecting out from said shoulders in order to hold said springs in position, the levers 0 having seats o to receive the opposite ends of said springs. In this manner the said springs r act to hold the jaws 19, carried by the levers 0, normally apart;

Pivoted at n to the carriage n is the lever 8, said lever having the slot .9", through which the bolt 8 passes, which connects said lever to the wedge-block if, said wedge-block entering the space between the rear arms of the levers 0 and when forced farther in between said arms acts to throw the rear arms of the levers 0 apart and throw the forward ends of said levers toward each other a correspondin g amount, whereby the clam ping-jaws p are operated to grasp the round to be rolled.

Secured to the front of the housing a is the stop-frame it, which acts to throw back the lever s when the carriage has been moved forward toward the rolls, and thus release the clamping-jawsp from their hold on the round.

In the rear of the housing a is an ordinary table '12, similar to the table g and adapted to receive the round as it is fed through from the front of the rolls. This table Q) is also raised and lowered by means of the hydraulic cylinders e.

WVhen my invention is in use, the operation is as follows: The bar 10 to be rolled into the round is first reduced in the roughing-rolls and is then brought to the finishing-rolls, where it is given the proper external form. As it comes from the roughing-rolls it is generally gothic in shape and is first passed through the pass 1 of the rolls 1). As it passes through the rolls it is discharged onto the table o,whereupon the table 11, as well as the table g, is raised and the catcher on the back side of the rolls lifts the bar from the table and passes it over the top roll Z2 back onto the table 9. The bar is now substantially the same shape in cross-section as the shape of the pass 1, fins having been formed at opposite points on the bar and the bar having a somewhat oblong shape. The bar in this shape is then given a quarter-turn and its rear end is introduced between the jaws p, whereupon the lever s is thrown forward and the jawsp grasp the round and hold it securely, the round meanwhile resting upon the rolls h of the table. The carriage n is then shoved forward sufficiently to bring the forward end of the round into the pass 2 of the rolls, whereupon the action of the rolls will act to draw the round forward and feed it through the pass. The round advances over the rolls of the table, being held by the jaws of the carriage, said carriage moving along the guide-rods Z. As the tong-closing mechanism is carried on the carriage itself,it is evident that the tongs will hold to the round as it is drawn in by the rolls, the carriage being drawn forward by the round as it passes through the rolls and on account of the gripping of the tongs upon the round preventing any possibility of the twisting of the same and insuring the passage of the bar through the roll in the exact position in which it is fed thereto and precluding the twisting of the bar. When the carriage has advanced far enough to bring the lever 3 into contact with the stop-frame u, the said lever will be thrown back to its original position, thereby opening the jaws p and releasing the round, which then continues to pass through the rolls until it is delivered onto the table 11. The round is then passed in the manner before described over the top roll back to the table g, whereupon it is given another quarter-turn in order to remove any fins which may have been formed in the last pass, and is again grasped by the jaws p and fed again to the same pass. This operation is repeated until the round has been elongated to the required length and has been rolled with an evenly-rounded surface. As it is customary to em ploy only two passes in rolling rounds, a wide feed-table is not required, as the table may be readily shifted according to the passes. to be employed and the diameter of the rounds to be rolled. The guide-frame is also readily shifted across the cross-bars 76 where necessary to bring the round into proper alinement with the pass of the rolls when grasped by the jaws. In this InannerI provide means for holding the round securely during its passage through the rolls and for feeding it in a straight course through the passes of the rolls, only one workman on each side of the rolls being necessary for the operation. This does away with the handling of the rounds by ton 's or hooks, which requires several men, as the round had to be held at several points and great care and skill were required to guide it properly through the rolls. Furthermore, by my invention the rounds can be supported upon a feed-table, which gives them an even support for their entire length, and the same mill may be used for rolling bars of other shapes in cross-section.

It is customary to use feed-tables in rolling bars of odd shapes in cross-section; but it has been impossible heretofore to use the same mill for rolling rounds, owing to the fact that the table interfered with the operations of the men who handled the rounds with tongs, it being impossible for them to work on a mill with such a feed-table. By my invention when it is desired to change the mill from one for rolling rounds to one for rolling other shapes it is only necessary to remove the guide-frame and the table employed for rolling said rounds. The table illustrated as employed for rolling rounds is not as wide as that for other shapes would be, owing to the fact that said table must be lifted up between the guide-rods Z when said table is raised; but it is a very simple matter to remove the table 9 and substitute a wider one where the mill is to be used for rolling other shapes.

It is of course apparent that my invention may be applied equally as well to a threehigh mill or to a reversing mill, and I do not wish to limit its use to such a two-high mill as shown. Where a three-high or reversing mill is employed, a holding and guiding device will be used on both sides of the rolls. Furthermore, I do not wish to limit myself to the exact construction illustrated, as that may be modified without affecting the scope of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a guideway extending longitudinally in front of the rolls, a carriage traveling on the guideway, gripping mechanism and gripclosing mechanism supported on and moving with the carriage, and grip-releasing mechanism in position to engage the grip-closing mechanism at the end of the travel of the carriage.

2. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a guideway extending longitudinally in front of the rolls, a carriage free to move on the guideway and independent of the other mechanism, gripping mechanism and gripclosing mechanism supported on and moving with the carriage, and a feed-table in line with the rolls.

3. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a guideway extending longitudinally in front of the rolls, a feed-table in line with the rolls, a carriage traveling on said guideway, levers mounted on said carriage and having jaws depending therefrom, in proximity to the feed-table, and a Wedge adapted to operate said levers.

4. The combination with suitable rolls, of a guideway extending longitudinallyin front of the rolls, a carriage traveling on said guideway, grasping-jaws on said carriage and a wedge on the carriage adapted. to close the jaws, and an operating-lever on said carriage connected to said wedge.

5. The combination with suitable rolls, of a guidewayextendinglongitudinally in frontof the rolls, a carriage traveling on said guideway, grasping-jaws on said carriage and a wedge on the carriage adapted to close the jaws, an operating-lever on said carriage connected to said wedge, and a stationary stopframe in the course of said lever.

6. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a feed-table in line with said rolls, a transversely-movable guideway arranged in front of said rolls, a carriage traveling on said guideway, and gripping and grip closing mechanism supported on and moving with said carriage.

7. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a movable feed-table in line with said rolls, a guideway extending longitudinally in front of the rolls, a carriage traveling onsaid guideway an d gripping mechanism supported on and moving with the carriage.

8. In mechanism for rolling cylindrical metal bars, the combination with suitable rolls, of a movable feed-table in line with the rolls, a transversely-movable guideway arranged in front of said rolls, a carriage traveling on said guideway, and gripping mechanism supported on and moving with the carriage.

In testimony whereof I, the said JOSEPH DASOHBAOH, have hereunto set my hand.

JOSEPH DASOHBAOI-I.

Witnesses:

R0131. D. TOTTEN, JAMES G. ll/IONTGOMERY. 

